avenue a a block from city hall. there was heavy known and firefighters say it appears the fire had several points origin. >> we got on scene. we found a building charged full of smoke and appeared to have a fire inside. we were able to contain the fire to the perimeter of the building itself. >> ama: damage is estimated at a quarter million dollars. no one was hurt. >>> in the east bay, police arrested two teenagers after officers say the boys used a pipe bomb to blow up a woman's mail box. alert neighbors helped police track down the teens before they could do more damage with a second explosive device. >> mangled remnants of what used to be a metal mail box is in the front yard of this home the morning after teenagers put a pipe bomb inside it. the explosion rocked the quiet neighborhood just before 10:00 p.m. >> a big explosion. and just shook the windows. woke me up. >> it's crazy times, you know. we're just really surprised how things happen like that. >> the resident of the home didn't want to give us her name. when we caught up with her she was in a hurry and hesitant to tal
